CN111288077A - reduction drive bearing - Google Patents

Abstract

The invention discloses a speed reduction transmission bearing, which comprises a flexible inner bearing and a rigid outer bearing; the outer ring surface of the outer ring of the flexible inner bearing is formed with a circle of external teeth, an axial extension ring arranged at one end of the outer ring of the flexible inner bearing is provided with a plurality of elastic cutting grooves and a radial flange, and the inner ring of the flexible inner bearing provides a harmonic cam embedded group for power input; a circle of internal teeth are formed on the inner ring surface of the inner ring of the rigid outer bearing, and the internal teeth are meshed with the external teeth of the flexible inner bearing to actuate; therefore, the outer ring of the rigid outer bearing is used for reducing the speed and outputting force to be connected, and when the flexible inner bearing is transmitted into the harmonic cam by power to rotate, the flexible inner bearing and the rigid outer bearing generate a speed reduction transmission effect.

Description

reduction drive bearing

technical field

The present invention relates to a transmission bearing, in particular to a deceleration transmission bearing.

Background technique

The traditional harmonic reduction reducer (harmonic reducer) is mostly composed of a rigid outer gear ring, a flexible inner gear ring and a harmonic cam. The inner ring surface of the rigid outer gear ring is provided with internal teeth, and the flexible inner gear ring The outer ring surface is provided with external teeth, the flexible inner gear ring is arranged in the rigid outer gear ring, and the harmonic cam is arranged in the flexible inner gear ring, so that the harmonic cam abuts the flexible inner gear ring, causing the flexible inner gear ring A part of the external teeth meshes with the internal teeth of the rigid external gear ring. When it is installed and used, the motor output power shaft is connected to the harmonic cam, and through the rotating action of the harmonic cam, the flexible inner gear ring is driven to rotate in the rigid outer gear ring, so that the flexible inner gear ring can be converted into low-speed power output. In this way, the harmonic reduction reducer can be applied to the fields of high load and low speed requirements, such as the joints of each axis of the robot arm.

However, this kind of power transmission mode in which the motor and the harmonic reduction reducer are connected in series with the shaft will inevitably cause the overall axial length to be too long, so that the installation space of the motor and the harmonic reduction reducer requires a larger size, which is not conducive to the mechanism planning. . For this reason, there is a rotary actuator solution proposed by Taiwan Invention Patent Publication No. 201626696. It is hoped that a hollow harmonic gear device is used to accommodate the motor, in order to achieve the purpose of reducing the axial size of the rotary actuator. However, the tooth width of the tooth transmission of the harmonic gear device disclosed in this solution is limited by the components of the flexible harmonic reduction drive tooth structure, so that it cannot have a better power transmission, resulting in an unsatisfactory torque output value of the rotary actuator. performance, the load capacity is relatively insufficient.

The inventor of the present invention adheres to the research and development spirit of excellence, and expects that the harmonic deceleration bearing can also have an excellent performance in torque output under the condition of reducing the axial size, so that the overall application level of the harmonic deceleration bearing will be wider. Invent the technology you want to actively disclose.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a deceleration transmission bearing, by which the deceleration transmission bearing is composed of a simple compound bearing meshing, so that the inner and outer teeth are more fully meshed to transmit power, the direct power transmission can be achieved, and the overall structure is more streamlined.

In order to achieve the above object, the deceleration transmission bearing of the present invention includes: a flexible inner bearing and a rigid outer bearing that are rotatably axially sleeved together, the flexible inner bearing and the rigid outer bearing both have an outer ring, an inner ring, and several rollers arranged between the inner and outer rings of the flexible inner bearing and several rollers arranged between the inner and outer rings of the rigid outer bearing; the outer ring of the flexible inner bearing The outer ring surface of the flexible inner bearing has a ring of outer teeth, one end of the outer ring of the flexible inner bearing has an axially extending ring, and a radial flange radially extends from the end of the axially extending ring, and the axially extending ring is provided with several Each of the grooves forms an elastic deformation portion connecting the flexible inner bearing and the radial flange; the inner ring surface of the inner ring of the rigid outer bearing has a ring of inner teeth, and the inner teeth are connected to the flexible inner ring. The outer teeth of the inner bearing are meshed with each other; and a harmonic cam is embedded in the inner ring of the flexible inner bearing, and the rotation of the harmonic cam causes the flexible inner bearing and the rigid outer bearing to produce a deceleration transmission effect.

In the above reduction transmission bearing, the number of teeth of the outer teeth of the flexible inner bearing is smaller than the number of teeth of the inner teeth of the rigid outer bearing.

In the above reduction drive bearing, the cut groove is a strip-shaped cut-out extending along the circumferential direction of the axially extending ring, and two ends of the strip-shaped cut-out are respectively formed with a hole.

In the above reduction transmission bearing, the outer ring and the radial flange of the rigid outer bearing are respectively provided with through holes through which the fixing components can be passed.

In the above reduction transmission bearing, the rollers of the flexible inner bearing are balls.

In the above reduction transmission bearing, the rollers of the rigid outer bearing are rollers, and the axis centers of the rollers of the rigid outer bearing are arranged in a cross-arrangement at a vertical angle.

The deceleration transmission bearing of the present invention directly forms a transmission state of tooth differential meshing by the flexible inner bearing and rigid outer bearing of the deceleration transmission bearing, so that the deceleration transmission bearing has a simple structure composed of compound bearing meshing, so as to achieve more complete meshing of the inner and outer teeth Power transmission, direct power transmission and a more streamlined overall structure.

Description of drawings

The features and advantages of the present invention are described in detail below in conjunction with the accompanying drawings:

FIG. 1 is a schematic perspective view of the combined structure of the reduction drive bearing of the present invention.

FIG. 2 is a schematic perspective view of the exploded structure of the deceleration transmission bearing of the present invention.

FIG. 3 is a perspective view of another exploded structure of the reduction drive bearing of the present invention.

FIG. 4 is a schematic cross-sectional view of the combined structure of the reduction drive bearing of the present invention.

FIG. 5 is a schematic front view of the combined structure of the reduction transmission bearing of the present invention.

Description of symbols in the attached drawings:

10 Flexible inner bearing; 11 Outer ring; 12 Inner ring; 13 Roller; 14 Outer teeth; 15 Axially extending ring; 16 Radial flange; 161 Perforation; Elastic deformation part; 20 rigid outer bearing; 21 outer ring; 211 perforation; 22 inner ring; 23 roller; 24 inner teeth.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the embodiments are not intended to limit the present invention.

Referring to FIG. 1, FIG. 2 and FIG. 3, the deceleration transmission bearing of the present invention is a deceleration transmission bearing with the functions of deceleration transmission and bearing the bearing of the power input shaft or the power output shaft, and its preferred specific embodiments mainly include: : a flexible inner bearing 10 and a rigid outer bearing 20, the flexible inner bearing 10 and the rigid outer bearing 20 both have an outer ring 11, 21, an inner ring 12, 22, and are arranged on the outer side of the flexible inner bearing 10 Several rollers 13 between the ring 11 and the inner ring 12 and several rollers 23 arranged between the inner ring 22 and the outer ring 21 of the rigid outer bearing 20, the diameter of the outer ring 11 of the flexible inner bearing 10 is smaller than The diameter of the inner ring 22 of the rigid outer bearing 20 enables the flexible inner bearing 10 and the rigid outer bearing 20 to be rotatably axially sleeved with each other.

Referring to FIG. 2 to FIG. 4 , the outer ring 11 and the inner ring 12 of the flexible inner bearing 10 are made of flexible materials, and the outer ring surface of the outer ring 11 of the flexible inner bearing 10 is specially implemented with a ring of outer teeth 14 , one end of the flexible inner bearing 10 is implemented with an axially extending ring 15, and a radial flange 16 radially extends from the end of the axially extending ring 15; One of the preferred embodiments of the groove 17 is a strip-shaped slot 171 extending along the circumferential direction of the axially extending ring 15, and two ends of the strip-shaped slot 171 are respectively formed with a hole 172, so that each An elastic deformation portion 18 connecting the outer ring 11 of the flexible inner bearing 10 and the radial flange 16 is formed between the grooves 17 .

2 to 4 , the outer ring 21 and the inner ring 22 of the rigid outer bearing 20 are made of rigid materials, and the diameter of the inner ring surface of the inner ring 22 of the rigid outer bearing 20 is larger than that of the flexible inner bearing 10 The diameter of the outer ring surface of the ring 11 enables the rigid outer bearing 20 to be axially sleeved on the outer ring surface of the flexible inner bearing 10. The inner ring surface of the rigid outer bearing 20 is implemented with a circle of inner teeth 24 corresponding to the outer teeth 14. , whereby the outer teeth 14 of the flexible inner bearing 10 are engaged with the inner teeth 24 of the rigid outer bearing 20 by the driving of a harmonic cam (not shown) arranged in the flexible inner bearing 10 (as shown in the figure). 5), and the number of teeth of the outer teeth 14 of the flexible inner bearing 10 is smaller than the number of teeth of the inner teeth 24 of the rigid outer bearing 20, thereby achieving the effect of reduction transmission.

Referring again to FIGS. 2 to 4 , the outer ring 21 of the rigid outer bearing 20 and the radial flange 16 of the flexible inner bearing 10 are respectively provided with through holes 211 and 161 through which fixing components (screws, etc.) can be inserted so as to communicate with each other. Fixed binding. The rollers 13 of the flexible inner bearing 10 are spherical balls, and can also be implemented as parallel-arranged rollers or needles. The rollers 23 of the rigid outer bearing 20 are preferably implemented as rollers, and the axes of the rollers 23 (rollers) of the rigid outer bearing 20 are arranged in a cross-arrangement at a vertical angle, so that the outer The ring 21 and the inner ring 22 are not axially disengaged.

In the present invention, the flexible inner bearing 10 is used as a power input component, and the rigid outer bearing 20 is used as a power output component after deceleration. 4 and 5, the power input shaft drives the harmonic cam (not shown) to rotate. Through the structure of the slot 17 and the elastic deformation part 18 of the flexible inner bearing 10, the flexible inner bearing 10 can be made to rotate. The bearing 10 is more likely to be propped apart by the harmonic cam, thereby fully meshing the outer teeth 14 of the flexible inner bearing 10 with the inner teeth 24 of the rigid outer bearing 20 . In addition, the number of teeth of the outer teeth 14 of the flexible inner bearing 10 in the present invention is smaller than the number of teeth of the inner teeth 24 of the rigid outer bearing 20 , so the rigid outer bearing 20 can be decelerated to output power, and the effect of high reduction ratio and direct transmission can be achieved. . Furthermore, the overall structure of the present invention is more compact, which is more beneficial to the convenience of manufacture and assembly.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims (6)

1. A deceleration drive bearing, characterized in that it comprises: a flexible inner bearing and a rigid outer bearing that are rotatably axially sleeved together, the flexible inner bearing and the rigid outer bearing both have an outer ring, an inner ring, and several rollers arranged between the inner and outer rings of the flexible inner bearing and several rollers arranged between the inner and outer rings of the rigid outer bearing; the outer ring of the flexible inner bearing The outer ring surface of the flexible inner bearing has a ring of outer teeth, one end of the outer ring of the flexible inner bearing has an axially extending ring, and a radial flange radially extends from the end of the axially extending ring, and the axially extending ring is provided with several Each of the grooves forms an elastic deformation portion connecting the flexible inner bearing and the radial flange; the inner ring surface of the inner ring of the rigid outer bearing has a ring of inner teeth, and the inner teeth are connected to the flexible inner ring. The outer teeth of the inner bearing are meshed with each other; and a harmonic cam is embedded in the inner ring of the flexible inner bearing, and the rotation of the harmonic cam causes the flexible inner bearing and the rigid outer bearing to generate deceleration transmission with each other. 2 . The deceleration transmission bearing of claim 1 , wherein the number of teeth of the outer teeth of the flexible inner bearing is smaller than the number of teeth of the inner teeth of the rigid outer bearing. 3 . 3 . The deceleration transmission bearing of claim 1 , wherein the cut groove is a strip-shaped cut-out extending along the circumferential direction of the axially extending ring, and two ends of the strip-shaped cutout respectively form a hole. 4 . The deceleration transmission bearing as claimed in claim 1 , wherein the outer ring and the radial flange of the rigid outer bearing are respectively provided with through holes capable of passing through the fixing components. 5 . 5. The deceleration transmission bearing of claim 1, wherein the rollers of the flexible inner bearing are balls. 6 . The deceleration transmission bearing as claimed in claim 1 , wherein the rollers of the rigid outer bearing are rollers, and the axes of the rollers of the rigid outer bearing are arranged to cross at a vertical angle. 7 .

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